Average monthly hours of sunshine in O'Fallon (IL)
The monthly total of sunhours over the year in O'Fallon (Illinois), the United States of America.
- On average, July is the sunniest month with 311 hours of sunshine.
- December has on average the lowest amount of sunshine with 128 hours.
- On average, the total annual amount of sun is 2612 hours.
Forecast for O'Fallon (IL)
partly cloudy and chance of slight rain
partly cloudy and small chance of slight rain
partly cloudy and no rain